ITEM NAME:TPA3116D2 120Wx2 Wireless Bluetooth 4.0 Audio Receiver Digital Amplifier Board!c Product Parameters: Model:XH-M548 Chip Type:TPA3116D2 Bluetooth module:btm835/csr8635(4.0) Transmission distance:Max 10m Voltage:DC12-24V Current:>3A Output Power:120Wx2 Efficiency ratio:>90% Sound track:Dual track Size:As the picture show Package included: 1 x Bluetooth 4.0 Audio Receiver Digital Amplifier Board.Chip Type:TPA3116D2. 1 x Bluetooth 4.0 Audio Receiver Digital Amplifier Board. Bluetooth module:btm835/csr8635(4.0). Efficiency ratio:>90%. Output Power:120Wx2.